Journal of King Saud University, Engineering Sciences最新文献

{"title":"Application of soil-based low-impact development system for Flash Flood management of Jeddah, Saudi Arabia","authors":"","doi":"10.1016/j.jksues.2021.09.006","DOIUrl":"10.1016/j.jksues.2021.09.006","url":null,"abstract":"<div><div>Jeddah is the most important port city in the Kingdom of Saudi Arabia. The climate of Jeddah is mostly dry; however, events of intensive rainfall followed by urban flooding have been reported in recent history. These floods interrupt the logistics and lifelines of the city. In this study runoff analysis and Flash Flood management by the green roof low impact development (LID) control system, was performed using United States Environmental Protection Agency (EPA)’s Stormwater Management Model (SWMM). Six middle districts of Jeddah city had been selected and modeled in five sub-catchment areas. The local soil and geographic conditions were incorporated into the model. The effect of the soil-based, rooftop, LID system has been emphasized in the analysis. In flood simulations, 30–70% of the impervious area of each sub-catchment has been treated with LID. It has been observed that the LID application can significantly reduce the overall flood flow. Thus, simple but well-planned LID control systems can be effectively utilized for the flood management of heavily urbanized regions.</div></div>","PeriodicalId":35558,"journal":{"name":"Journal of King Saud University, Engineering Sciences","volume":"36 7","pages":"Pages 455-462"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83252636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Static and dynamic characterization of fiber reinforced sand: A numerical investigation","authors":"","doi":"10.1016/j.jksues.2021.12.008","DOIUrl":"10.1016/j.jksues.2021.12.008","url":null,"abstract":"<div><div>For the characterization of fiber-reinforced soil under static loading conditions, there is a wealth of literature. However, study on the dynamic behavior of fiber-reinforced soil is very limited. Now that earthquakes are occurring frequently around the world, the dynamic soil analysis has become important for all classes of geotechnical engineering problems. Through numerical simulation of triaxial specimens, the current study explores the behaviour of fiber-reinforced cohesionless soil. The numerical model was validated using existing laboratory triaxial compression testing literature. The stress–strain response of fiber-reinforced sand has been investigated using static and cyclic triaxial testing, as well as other combinations of fiber contents. Fiber-reinforced sand is tested for bulk modulus, shear modulus, and damping values. Effects of fiber contents on static and dynamic stress–strain response of fiber-reinforced soil are highlighted. It has been observed from results that, with an increase in fiber content modulus of elasticity, bulk modulus and shear modulus values increase while damping coefficients decrease for the same. It is believed that the highlighted numerical approach will be an alternative to laboratory experiments to determine the dynamic properties of fiber-reinforced soil.</div></div>","PeriodicalId":35558,"journal":{"name":"Journal of King Saud University, Engineering Sciences","volume":"36 7","pages":"Pages 517-523"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86494898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Understanding the impacts of binary additives on the mechanical and morphological response of ameliorated soil for road infrastructures","authors":"","doi":"10.1016/j.jksues.2021.12.001","DOIUrl":"10.1016/j.jksues.2021.12.001","url":null,"abstract":"<div><div>In an attempt to promote a cleaner environment, the deployment of waste materials in soil amendment protocols has been a major concern for civil engineers. Recent discoveries in the study of soil mechanics have revealed the pozzolanic tendencies demonstrated by these waste materials, which are beneficial in the development of road infrastructure. This has necessitated the need for this research to document the impacts of exploring the usage of combined solid waste derivatives in ameliorating the geotechnical parameters of deficient soil. The current stabilization exercise was geared towards the improvement of the mechanical properties of soil and surpassing the detrimental tendencies especially caused by seasonal variations. Moving forward, the microstructural response of the unaltered and additive ameliorated soil was investigated via qualitative means such as scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy. The additives including cement kiln dust (CKD) and rice husk ash (RHA), were added by air-dried weight of the soil and compacted based on the standards of British Standard Light (BSL), West African Standard (WAS) and British Standard Heavy (BSH). With regard to the compaction exercise, the incorporation of these additive materials into the soil facilitated a gradual increase in the maximum dry density (MDDs) followed by a decrease in the optimum moisture contents (OMCs). In view of these research findings, soil treatment studies facilitated a substantial upsurge in the strength (California bearing ratio (CBR) and unconfined compressive strength (UCS)) values of the ameliorated soil, in agreement with the requirements of Nigeria's general specification for all compactive efforts. Finally, the usefulness and efficacy of combining these wastes in deficient soil treatment were validated qualitatively via the SEM and FTIR strategies. The results of the SEM analysis revealed some disparities between the unaltered and altered soil specimens, providing insights into the direction of calcite formation in the additive-treated soil.</div></div>","PeriodicalId":35558,"journal":{"name":"Journal of King Saud University, Engineering Sciences","volume":"36 7","pages":"Pages 463-472"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82664207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Compression resistance and color evaluation in artisanal red bricks: Experimental study and numerical simulation","authors":"","doi":"10.1016/j.jksues.2023.10.002","DOIUrl":"10.1016/j.jksues.2023.10.002","url":null,"abstract":"<div><div>An experimental study is presented, simulating the firing process of artisanal red brick in a laboratory muffle. Under controlled heating conditions, the influence of both temperature and time on both the compressive strength and surface color of model bricks are evaluated. A production run and numerical simulations of laboratory brick heating are used to define the experimental conditions in the laboratory. A statistical model replicates the behavior of the compressive resistance at different temperatures, both in the muffle furnace and in production. Brick color has a more representative tone of a well-burned brick when created at the burning temperatures suggested in the literature.</div></div>","PeriodicalId":35558,"journal":{"name":"Journal of King Saud University, Engineering Sciences","volume":"36 7","pages":"Pages 446-454"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135810649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of conflicts on the contracting business failure in the construction industry","authors":"","doi":"10.1016/j.jksues.2023.12.003","DOIUrl":"10.1016/j.jksues.2023.12.003","url":null,"abstract":"<div><div>The construction industry plays an important role in the economy of countries and provides the necessary services to achieve the needs and welfare of societies. For this, attention should be given to this sector. The research aims to indicate the most important causes of conflicts in construction projects, the most important reasons for the failure of construction contracting companies, and to study the relationship between conflicts and failure of contractors in the construction industry. This study uses the questionnaire method to achieve its objectives. The target participants are contractor of grade 1 and 2 in Palestine. Eighteen (18) conflict factors and 17 influencing factors in contracting failure are identified and tabulated in a questionnaire form. Results show that the main conflict factors include: delaying monthly payments from the project owner, frequent variation orders, the quality of work is poor, rework, and delay in delivering the works according to the schedule. While the main factors of contractors failure are: cash flow problems, conflict between parties, bidding strategy, local political conditions and low profit due to high competitions. The results show a correlation between conflict and contracting business failure. The results of the research would be of great importance to those interested in the construction industry, as they contribute to identifying the causes of major problems in the construction sector and help in its renaissance and development.</div></div>","PeriodicalId":35558,"journal":{"name":"Journal of King Saud University, Engineering Sciences","volume":"36 7","pages":"Pages 498-503"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139394072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring the critical frequent factors of rework and assigning strategies to mitigate their occurrence in the Egyptian construction projects","authors":"","doi":"10.1016/j.jksues.2021.10.002","DOIUrl":"10.1016/j.jksues.2021.10.002","url":null,"abstract":"<div><div>This article explores the critical frequent factors of rework and assigns management strategies to mitigate their occurrence in the Egyptian construction projects. Data from 69 practitioners have been analyzed utilizing the questionnaire research strategy to specify the occurrence likelihood mean scores of 38 rework factors. Thereafter, a mean score of 3.50 has been employed as a trustworthy critical cut-off value, which has singled out 15 factors from the 38 rework causes to be the critical frequent rework factors in Egypt’s construction sector. Further, the study chose 10 strategies from the previous literature, through which the consequences of the 15 critical frequent rework factors can be handled. The results highlight the practices to be addressed by policy-makers and practitioners in Egypt to boost the performance of their construction sector. The realization of the paper’s goals has pivotal benefits in both practical and theoretical fields, either at the local or international level. Locally, this equips the stakeholders of Egypt’s construction division with the needed prevention strategies, which can influentially mitigate the implications of rework causes. As for the international level, new top-rated country-specific rework factors have been derived from the Egyptian construction market, which broadens the understanding of academics to rework’s critical causes.</div></div>","PeriodicalId":35558,"journal":{"name":"Journal of King Saud University, Engineering Sciences","volume":"36 7","pages":"Pages 504-516"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77583681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Life cycle assessment of incorporating recycled materials in pavement design","authors":"","doi":"10.1016/j.jksues.2022.04.001","DOIUrl":"10.1016/j.jksues.2022.04.001","url":null,"abstract":"<div><div>This study was set out to conduct a life cycle assessment (LCA) to explore the environmental and economic impacts of pavement design alternatives using reclaimed asphalt pavement (RAP) and recycled plastic. 25 design alternative pavement designs were considered for a four-lane 8 km-long highway section. Design mix percentages varied between 0 and 40% of RAP with 10% increments and 0–20% of recycled plastic with 5% increments. The impact was assessed based on estimating utilized energy and water resources, climate change impact in terms of CO₂ equivalent, and air pollution in terms of air acidification, human health particulate (HHP), and photochemical smog. Results show that recycled plastic is superior to RAP in reducing energy consumption and GHG emissions. Both RAP and recycled plastic reduced water consumption. Recycled plastic reduced air acidification, HHP, and smog. RAP also increased HHP substantially, mainly during materials production. It was found that the RAP replacement ratio of 10% yielded the highest value of energy consumption, harmful gases emissions, air acidification, HHP, and Smog. RAP and plastic both reduced costs substantially as recycled material reduced the use of virgin materials and bitumen. In addition, using RAP eliminates the cost of moving RAP to landfills.</div></div>","PeriodicalId":35558,"journal":{"name":"Journal of King Saud University, Engineering Sciences","volume":"36 7","pages":"Pages 473-484"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90333382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Acknowledgment to Reviewers","authors":"Anis H. Fakeeha (Editor-in-Chief)","doi":"10.1016/j.jksues.2024.10.003","DOIUrl":"10.1016/j.jksues.2024.10.003","url":null,"abstract":"","PeriodicalId":35558,"journal":{"name":"Journal of King Saud University, Engineering Sciences","volume":"36 7","pages":"Page 533"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Special issue – Recent advances in Civil Engineering","authors":"Nadeem Ahsan Siddiqui","doi":"10.1016/j.jksues.2024.10.002","DOIUrl":"10.1016/j.jksues.2024.10.002","url":null,"abstract":"","PeriodicalId":35558,"journal":{"name":"Journal of King Saud University, Engineering Sciences","volume":"36 7","pages":"Page 437"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effectiveness of replacing cement partially with waste brick powder in mortar","authors":"","doi":"10.1016/j.jksues.2022.01.004","DOIUrl":"10.1016/j.jksues.2022.01.004","url":null,"abstract":"<div><div>This investigation was aimed at finding the optimum replacement level of waste brick powder (WBP) as a partial replacement of cement. For this purpose, three groups of tests are made: fresh, mechanical, and permeation properties. Eight mixes with different percentages of replacing ratios are as follows: 10, 15, 20, 25, 30, 35, 40, and 50%. In addition to the reference mix without powder replacements, the experimental programs include three groups of tests: fresh properties (flow test and fresh density), mechanical properties (dry density, compressive strength, and flexural strength), and transport properties (water absorption ratio, rate of water absorption, i.e., sorptivity, and permeable void ratio). Also, an ultrasonic velocity impulse test was made. The flowability and density of fresh mixes are decreased linearly as the amount of WBP increases for the constant water/binder ratio. However, the density of the in-hardened state was found to be slightly higher than the reference mix for mixes with a brick powder content of up to 20%. Results indicate that strengths for mixes containing WBP are higher than those for the control mix. The highest strength was examined in the mix with 15% WBP for both compressive and tensile strengths of specimens. Generally, the brick powder reduced the ability of mortar to transfer liquid, as was clear from the results of the permeability test results. Empirical relations were proposed according to experimental results.</div></div>","PeriodicalId":35558,"journal":{"name":"Journal of King Saud University, Engineering Sciences","volume":"36 7","pages":"Pages 524-532"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87030309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}